/Engine/Plugins/Runtime/SmartObjects/Source/SmartObjectsModule/Public/SmartObjectSubsystem.h
[ESmartObjectCollectionRegistrationResult](API\Plugins\SmartObjectsModule\ESmartObjectCollectionRegistrati-) RegisterCollection ( [ASmartObjectPersistentCollection](API\Plugins\SmartObjectsModule\ASmartObjectPersistentCollection) & InCollection )